The Spring MVC project built with STS 2.6 has the following configuration added in the `pom.xml`:
```xml
org.apache.tiles
tiles-extras
2.2.1
```
In the `applicationContext.xml`, the following configuration is added:
```xml
/WEB-INF/tiles.xml
```
A new file named `tiles.xml` is created under `/WEB-INF/` with appropriate content, and all the necessary JSP files are present.
After deploying to Tomcat 6.0.29, when accessing `http://localhost:8080/springmvctiles/contact` in the browser, the result appears as if Tiles 2 integration did not work properly. Only `contact.jsp` is displayed, along with an error of type `org.springframework.core.ConstantException`. The other pages are not rendered. What could be the issue? The project uses Spring 3.0.5 and Tiles 2.2.1.
---
### Possible Solution
This problem might occur due to one or more of the following reasons:
1. **Incorrect Configuration in `tiles.xml`:**
Ensure that the `tiles.xml` file is correctly configured. It should define layouts and views properly. For example:
```xml
```
2. **Tiles Resolver Not Configured Properly:**
Verify that the `TilesViewResolver` bean is correctly defined in the Spring configuration file (e.g., `applicationContext.xml`). It should look like this:
```xml
```
3. **Jar File Compatibility Issues:**
Ensure there are no conflicts between the versions of Spring (3.0.5) and Tiles (2.2.1). Sometimes, mismatched versions can cause runtime issues. Check the dependency tree using Maven's `dependency:tree` command to ensure no conflicting versions exist.
4. **Controller Mapping Issue:**
Confirm that the controller mapping for `/contact` returns the correct view name (`contact`) that matches the definition in `tiles.xml`.
Example Controller Code:
```java
@Controller
public class ContactController {
@RequestMapping("/contact")
public String showContactPage() {
return "contact"; // This should match the name in tiles.xml
}
}
```
5. **Tomcat Classloader Issues:**
If you have multiple versions of the same library in your application or Tomcat's `lib` folder, it might lead to classloading conflicts. Ensure that only the required versions of libraries are present.
6. **Error Handling:**
The `org.springframework.core.ConstantException` suggests that there might be a constant-related issue in your code or configuration. Double-check any constants used in your controllers or configurations.
---
### Additional References
For further troubleshooting, consider the following resources:
- **File.delete() not working:** [Link](http://www.myexception.cn/java-web/43660.html)
- **JTable image display issue:** Why does clicking on an image in a JTable make it blank? [Solution](#)
- **Reducing JS method parameters:** Techniques to minimize the number of parameters in JavaScript functions. [Solution](#)
- **Blocking Servlet Threads:** How to pause servlet threads and delay client response. [Solution](#)
By carefully reviewing the above points, you should be able to identify and resolve the issue with Tiles integration in your Spring MVC project.